External camera's which is best for you?

By and large money dictates what camera system we will own or install. From a wired high end camera systems to wireless single cameras that you can find on sale at sites like WWW.sportsmansguide.com , or a small pack at Sams club. The idea of course is to deter burglars , drug dealers and such and possibly have evidence for the police in the event that something bad does happen. For those who don't know, a camera system can get you a percentage off of your home owners insurance. It doesn't exactly pay for itself, but it doesn't hurt.
What ever the case cameras are worth their weight.
Peace,
David